/* Test of execle().
   Copyright (C) 2020-2021 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */

#include <config.h>

/* Specification.  */
#include <unistd.h>

#include "signature.h"
SIGNATURE_CHECK (execle, int, (const char *, const char *, ...));

#include <stdio.h>
#include <string.h>

/* Looks up the NAME=VALUE assignment among the environment variables.
   Returns it, or NULL if not found.  */
static const char *
get_environ_assignment (const char *name)
{
  size_t name_len = strlen (name);
  char **p;
  for (p = environ; *p != NULL; p++)
    {
      const char *assignment = *p;
      if (strncmp (assignment, name, name_len) == 0
          && assignment[name_len] == '=')
        return assignment;
    }
  return NULL;
}

/* Creates a minimal environment.  */
static void
create_minimal_env (const char *env[5])
{
  const char **p = env;
  *p++ =
    #ifdef __CYGWIN__
    /* The Cygwin DLLs needed by the program are in /bin.  */
    "PATH=.:/bin";
    #else
    "PATH=.";
    #endif
  *p = get_environ_assignment ("QEMU_LD_PREFIX");
  if (*p != NULL)
    p++;
  *p = get_environ_assignment ("QEMU_CPU");
  if (*p != NULL)
    p++;
  *p++ = "Hommingberg=Gepardenforelle";
  *p = NULL;
}

int
main ()
{
  const char *progname = "./test-exec-child";
  const char *env[5];
  create_minimal_env (env);
  execle (progname,
          progname,
          "abc def",
          "abc\"def\"ghi",
          "xyz\"",
          "abc\\def\\ghi",
          "xyz\\",
          "???",
          "***",
          "",
          "foo",
          "",
          NULL,
          env);

  perror ("execle");
  return 1;
}
